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 All Categories    Hand-Held TDR / Cable Length Meter - Megger TDR900
Weschler Instruments is a manufacturer and distributor of electrical and electronic measurement equipment. Customers worldwide use our products in power plants, steel mills, chemical plants, paper mills and other industrial applications that require rugged, reliable and accurate instrumentation.
All Categories > Test Equipment > Megger® Hand-Held TDR / Cable Length Meters > Hand-Held TDR / Cable Length Meter - Megger TDR900 > Item # ME/TDR900  
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Item # ME/TDR900, Hand-Held TDR/Cable Length Meter


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  • Measures length of power, telephony, CATV & LAN cables
  • Determines distance to an open or short
  • Automatic impedance control (25, 50, 75, 100, 125, 150W)
  • Internal library of 39 standard cable types
  • Memory for 20 custom cable settings
  • Tone generator for cable tracing
  • Large, high resolution backlit LCD display
Additional Features:
Cable Calibration function allows measurement of V.O.P. (Velocity Of Propagation) in a known cable length. Requires at least a 30ft (10m) sample. Line Voltage Detection feature displays "OUCH" message and stops operation if voltage exceeds 6.5V. Supplied with soft carrying case and alligator clip adapter.



12000 ft (3.7km) at 99.9 V.O.P.
6200 ft (1.9km) at 50.0 V.O.P.
8000 ft (2.4km) at 66.0 V.O.P.
9800 ft (3.0km) at 80.0 V.O.P.


±2% of rdg ±20" at <300 ft
±2% of rdg at >300 ft


20 inches (50cm)

Velocity Of Propagation

adjustable from 1.0% to 99.9% of the speed of light




4 AA batteries

Battery Life

5000 tests

Operating Temperature

-18 to 60 ºC
1 at 20°C for coax cables <8000 ft, telephony cables <6000 ft, wiring <3000 ft


 width= Catalog Page 173a - Megger TDR
(PDF, 142KB)

 width= Megger-TDR900 Datasheet
(PDF, 184KB)

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